KR101994244B1

KR101994244B1 - Joint including connection surface, pipe including pipe joint, and piping structure including same

Info

Publication number: KR101994244B1
Application number: KR1020147023420A
Authority: KR
Inventors: 유키오 우에니시; 유지 콘도
Original assignee: 가부시키가이샤 유테크
Priority date: 2012-01-24
Filing date: 2013-01-22
Publication date: 2019-09-30
Also published as: US20140367960A1; EP2808590B1; CN104081103B; KR20140116215A; US9976679B2; EP2808590A4; CN104081103A; JP5957387B2; JP2014122692A; EP2808590A1; WO2013111748A1

Abstract

An object of the present invention is not to store contaminants on an inner surface of a pipe having a pipe joint constituting a pipe and a joint having a connection surface.
The present invention provides a pipe having a joint inserted into an end portion of a pipe constituting the pipe, the joint hole of the joint and the inner surface of the end of the pipe, and a joint having a structure for welding the outer periphery of the pipe and the joint; A joint having a connection surface composed of a main body having a connection surface to which a joint of the pipe can be connected, and by using the joint of the pipe by connecting the connection surface of the joint with a bolt, The inner surface was smoothed so that no recess was present.

Description

Joint with connection surface, pipe with pipe joint, and piping structure composed of them {JOINT INCLUDING CONNECTION SURFACE, PIPE INCLUDING PIPE JOINT, AND PIPING STRUCTURE INCLUDING SAME}

The present invention is to construct a hydraulic circuit for supplying the operating pressure oil from the pressure fluid source to a hydraulic device such as a hydraulic cylinder, a hydraulic motor, etc., which is a driving device used to drive a flood gate of a dam, an estuary bank of a river, or an industrial machine. The present invention relates to a pipe having a joint and a pipe joint having a connection surface used for a pipe, and a pipe structure having the same.

Hydraulic devices such as hydraulic gates of dams, river drains in rivers, or hydraulic cylinders that drive industrial machinery, hydraulic motors, etc., are supplied with operating pressure oil from a pressure fluid source through hydraulic circuits. It is installed near the driven equipment.

The pressure fluid source is a device incorporating an electronic device or a switching valve for controlling the supply / discharge of working pressure oil to a hydraulic tank, a hydraulic pump, and a hydraulic device. Therefore, a building is prepared and installed in the building. For this reason, the distance from a pressure fluid source to a hydraulic apparatus becomes long.

In the hydraulic circuit from the pressure fluid source to the hydraulic device, the straight pipe portion constituting the hydraulic circuit is a welded pipe joint which is plugged into an end of a steel pipe having a prescribed length (about 6 meters). It is the structure which welds and connects a socket, The curved pipe part bends a steel pipe with a bender, welds a socket to the edge part, and responds to bending or a branch of a radius which cannot be responded by a bender, The hydraulic circuits were constructed to fit the pipes using elbows, teees, and crosses.

The socket 50 of the borrowed welded pipe joint constituting the straight pipe portion constitutes a hydraulic circuit at both ends of the straight pipe body 51 as shown in FIG. 16, the assembled state of the pipe and the socket, and before assembly. End portions 55a and 56a of the pipes 55 and 56 have pipe end insertion holes 52 and 53 inserted therein.

Between the pipe end insertion holes 52 and 53, a protrusion 54 is formed to form a small diameter hole 54a having a diameter corresponding to the inner diameter of the pipes 55 and 56, and the protrusion 54 and the tube end insertion are provided. Steps 52a and 53a are provided between the holes 52 and 53. The socket 50 ties the tube 55 and the tube 56 to the stepped portion 52a of the tube insertion hole 52 as shown in the right side of FIG. 16. It inserts until it contacts, and as shown to the left of FIG. 16, the outer periphery of the pipe 55 and the socket 50 are welded in the welding part 58, and the straight pipe part of a hydraulic circuit is comprised.

The elbow 60 of the borrow welded pipe joint constituting the curved pipe portion is a pipe constituting a hydraulic circuit at both ends of the curved main body 61 as shown in FIG. 17. There are tube end insertion holes 62 and 63 into which end portions 65a and 66a of 65 and 66 are inserted. Between the tube insertion holes 62 and 63, a projection 64 is formed to form a small diameter hole 64a having a diameter corresponding to the inner diameter of the tubes 65 and 66. The projection 64 and the tube insertion hole are provided. Steps 62a and 63a are provided between the 62 and 63.

The elbow 60 inserts the end 65a of the tube 65 until its tip abuts against the stepped portion 62a, and the outer periphery of the tube 65 and the curved main body 61 are welded (welded portions). And the end portion 66a of the tube 66 is inserted until its tip abuts against the step portion 63a, and the outer periphery of the tube 66 and the curved main body 61 are welded. Is welded at the weld portion 68 to form a curved portion of the hydraulic circuit.

As described above, the socket 50, the elbow 60, the end portions 55a, 56a, 65a, 66a of the tubes 55, 56, 65, 66, etc., the tube end insertion holes, etc. 52, 53, 62 And 63) to weld the outer periphery of the pipe and the like, and the socket 50 and the elbow 60 to form a straight pipe portion and a curved pipe portion of the pipe structure.

In the above pipe structure, the diameter of the pipe end insertion hole of the pipe joint into which the end of the pipe or the like is inserted is slightly larger (about 0.5 mm with a nominal diameter of 20 A) so as to improve workability. A gap A occurs between the outer circumference of the tube and the tube end insertion hole. For this reason, the surface of the tube is oxidized by heat by welding of the inserted tube and the tube joint, and remain on the surface of the tube, that is, the gap A as an oxide film.

Since the oxide film is thin, sharp and is an oxide of iron, it is separated from the gap A while floating in the hydraulic oil while the hydraulic device is extremely hard. And damage to their sliding surfaces by invading the control valves and hydraulic equipment, resulting in contaminants that cause malfunction.

In addition, high pressure pressure is applied to the hydraulic fluid to drive the hydraulic equipment. Furthermore, water and air invade through the hydraulic equipment, and metal powder and seal damage are caused by the operation of the hydraulic pump, the valve and the cylinder. Various foreign substances such as residues are mixed.

Air, water, and various foreign substances mixed in the above-mentioned hydraulic oil activate the hydraulic oil according to the temperature rise generated by the operation of the hydraulic equipment, and the resin becomes a preliminary sludge, deteriorating the hydraulic oil and simultaneously It becomes a pollutant that reduces the function of.

In Patent Document 1, as shown in FIGS. 18A and 18B, the end 76a and the tube end insertion hole 73 of the tube 76 inserted into the tube end insertion hole 73 of the tube joint 70. The construction of arranging and arranging the welding width h between the step portions 73a of the joint and welding at the welding portion 79 to block the gap A between the tube end insertion hole 73 and the outer circumference of the tube 76 appears. have. 19 shows the weld width h between the end portion 86a of the tube 86 inserted into the tube end insertion hole 83 of the tube joint 80 and the stepped portion 83a of the tube end insertion hole 83. The structure which arrange | positions, arrange | positions, and welds in the welding part 89 and seal | blocks the clearance gap between the tube end insertion hole 83 and the outer periphery of the tube 86 is shown.

In the connection configuration of the pipe joint 70 and the pipe 76 described above, contaminants remaining in the gap A can be sealed. However, since welding is performed between the tip of the end 76a of the tube 76 and the step 73a in the weld width h, the gap between the end 76a and the step 73a. (h1) is formed. 19, the clearance gap h1 is formed also in the connection structure of the pipe joint 80 and the pipe 86. As shown in FIG.

The piping structure 70c of the straight pipe shown in FIG. 19 is the pipe structure provided with the pipe joint 70, and the same structure as this pipe structure, and the pipe structure provided with the pipe joint 80 is a hexagonal socket head bolt 82. It is fastened to

In addition, the connection hole 71a of the pipe joint 70 is the structure which provided four in the circular shape concentric with the connection hole 74. As shown in FIG. Moreover, the connection hole 81a of the pipe joint 80 screwed to this pipe joint 70 is provided in the same position as the said 4 connection hole 71a. In addition, the connection hole 71a and the connection hole 81a have a screw hole structure and a through hole structure, one of which is a screw hole structure and the other is a through hole structure. This structure is prescribed | regulated to JISB2291.

The pipe joint 70 and the pipe joint 80 have a structure in which the connection hole 71 a of the pipe joint 70 is a through hole, whereas the connection hole 71 a of the pipe joint 70 is a female screw, and The structure in which the O-ring 72 for sealing between the pipe joint 70 and the pipe joint 80 is provided on the connection surface 77 of the joint 70 is different. The description will be made according to the description and the detailed description is omitted.

In the pipe structure 70c of the straight pipe formed by fastening the pipe joint 70 and the pipe joint 80 with four hexagon socket head bolts 82, the pipe joint used for the pipe structure where the gap h1 constitutes the straight pipe. It exists in correspondence with the number.

Publication No. 7-103374

The tube joint 70 attachment tube disclosed in Patent Literature 1 inserts an end portion of the tube into the tube end insertion hole of the tube joint, and welds the welded portion 78 and the welded portion 79 before and after the insertion portion between the tube end insertion hole and the tube. In order to block the clearance gap A which arises in the inside, contaminants, such as an oxide film in this clearance gap A, do not flow out in a hydraulic circuit. However, since the gap h1 includes a plurality of concave portions (as many as the number of pipe joints), the above-mentioned contaminants and air are stored to cause deterioration of the operating oil early.

In the piping constituting the hydraulic circuit, in addition to the pipe joint 70, the borrowed welding joints such as the socket 50, the elbow 60, the tie, the cross and the like are used in combination. Since these borrowed welding joints have a structure in which the pipe end insertion hole and the pipe end cannot be welded, the gap A is opened inside the pipe. For this reason, there was a problem in that contaminants, such as an oxide film, due to welding work on pipes were not prevented from being mixed into the pressurized oil.

The joint provided with the connection surface which is 4th invention has the 1st connection surface and 2nd connection surface connected to the connection body, such as a joint of piping, such as a port of a hydraulic apparatus, or a piping which has a passage which distributes hydraulic fluid, and the said 1st connection surface. An opening in the first connecting end, the first connecting end being opened and connected to the passageway, the first connecting hole comprising a screw hole opening in the first connecting surface and arranged concentrically with the first opening end, and opening in the second connecting surface. A second opening end connected to the passage, a second connection hole formed of a through hole or a screw hole opened in the second connection surface and arranged concentrically with the second opening end, and the first opening end. And a main plane having a communication passage communicating with the second opening end, the first plane including the first connection surface at the same time as the arrangement of the first connection hole and the second connection hole; And a phase comprising the second connection surface The second plane intersects, and at the same time, the first connection surface is a square centered on the first opening end, and the second connection surface includes the same square as the square centered on the second opening end. It is characterized in that one side thereof has a rectangular shape having a length equal to or greater than the depth of the first connection hole on one side of the square.

The joint provided with the connection surface of the above-mentioned structure has the effect that it does not comprise the air | atmosphere or the storage location of a pollutant which is a cause of a contaminant by the smooth flow path structure which does not have a clearance gap or a welding part in the communication path and a connection surface. .

The pipe provided with the pipe joint of the fifth invention includes a pipe constituting the pipe, a pipe end insertion hole on one side, and a pipe end insertion hole on one side where one end of the pipe is inserted with a gap at one end of the pipe. A seal groove provided on one side of the one-sided connection hole which is extended and has a diameter corresponding to the inner diameter of the pipe, and a one-sided connection surface on which the connection hole is opened; It consists of a connection hole of the through-hole arrange | positioned concentrically with the said connection hole in the outer periphery of a seal groove, and welds the inner surface of the said one end and the inner surface of the said one connection hole, One end pipe joint welded by fixing one end pipe insertion hole, and the other end pipe insertion hole into which the other end of the pipe is inserted with the gap at the end of the other side of the pipe, and A connection hole on the other side that is extended to the short insertion hole and has a diameter corresponding to the inner diameter of the pipe, and a connection surface on the other side through which the connection hole is opened; And a screw hole connecting hole arranged in the through hole to make the same arrangement of the connecting hole of the through hole. The inner surface of the other end and the inner surface of the other connecting hole are welded together with the outer periphery of the pipe. It is characterized by consisting of the other side of the tube joint is welded and fixed to the other end end insertion hole.

Since the pipe provided with the tube joint of the above structure is a structure in which the end of the pipe inserted into the pipe end insertion hole and the inner surface of the connection hole are welded, no concave portion is formed on the inner surface of the pipe provided with the pipe joint. The contaminant is sealed, and at the same time, a smooth flow path is formed, and the stress caused by hydraulic pressure acting on the outer circumference of the pipe and the welded portion of the joint is reduced.

The piping structure of 6th invention is a 1st connection surface and 2nd connection surface connected to the connection body, such as a joint of piping, or a port of a hydraulic apparatus which has a passage which distributes hydraulic fluid, and it opens in the said 1st connection surface, and the said passage A first connection hole configured to be connected to the first opening end, the first connection hole formed in the first connection surface, and a screw hole arranged concentrically with the first opening end, and the second connection surface open to the passage. A second connection hole formed by a second opening end to be connected, a through hole or a screw hole which is opened in the second connection surface and is disposed concentrically with the second opening end, and the first opening end and the second dog. A first plane and a second having a main body having a communication path communicating with the end, and having the same arrangement of the first connection hole and the second connection hole of the main body, and including the first connection surface. The second plane comprising a connection surface Intersect and at the same time make the first connecting surface a square centered on the first opening end, the second connecting surface comprising a square identical to the square centered on the second opening end, and one side thereof One side of the said pipe | tube with the joint which has a rectangular connection surface of the length which added the length more than the depth of the said 1st connection hole to the said square side, the pipe which comprises a piping, and the edge part on the one side of the said pipe | tube, One end of the tube end insertion hole into which the end of the side is inserted with a gap, and a connection hole of one side that is extended to the tube end insertion hole and has a diameter equivalent to the inner diameter of the tube, and one side of the connection surface through which the connection hole is opened. A seal groove surrounding the one-side connection hole and a connection hole of a through-hole arranged on the concentric circle at the outer circumference of the seal groove; On the one side pipe joint which welds the inner surface of one end part and the inner surface of the said one side connection hole, and welds and fixes the outer periphery of the said pipe | tube and the said pipe end insertion hole of the said one side, and the edge part of the other side of the said pipe | tube, And the other end of the tube end insertion hole into which the other end of the tube is inserted with the gap, and the other end connection hole having the diameter corresponding to the inner diameter of the tube and the connection hole being opened to the tube end insertion hole. The connection surface of the other side is provided, Comprising the connection hole of the said through hole arrange | positioned concentrically with the connection hole of the said other side, Comprising: The screw hole connection hole is comprised, The other end part Conduit consisting of the other side pipe joint which welds the inner surface of the inner side of the connection hole of the said other side, and welds and fixes the outer periphery of the said pipe | tube, and the other end end insertion hole of the said other side. It consists of a tube provided with a bit, and further characterized in that the connection surface of the joint having the contact face, and is fixed by the tube joint of a pipe having the tube joint in the screwed.

The pipe structure of the above structure is a structure in which the pipe structure constituted by the joint having the connection surface and the pipe having the pipe joint does not generate contaminants, and does not form a recess in the inner surface thereof. Since it is composed of a smooth inner surface, it is effective to prevent the storage of contaminants.

According to the present invention, the pipe structure, which is a material required for plumbing work, and the joint with a connection surface may be configured with a smooth flow path that does not form recesses, gaps, etc. that store pollutants on the inner surface thereof. In addition, it is possible to clean the contaminants or air in the flow path. In addition, since it is not necessary to involve welding work in any part of the plumbing work, there is an effect that all parts thereof can be produced in the factory.

1 (a) is a perspective view of a piping structure according to the first embodiment of the present invention.
Figure 1 (b) is a partial perspective view of the tube structure according to the first embodiment of the present invention.
Figure 1 (c) is a partial tube structure diagram of the tube structure according to the first embodiment of the present invention.
1 (d) is a cross-sectional view of the piping structure according to the first embodiment of the present invention.
1 (e) is a front view of a connection surface 41 of a joint with a connection surface according to the first embodiment of the present invention.
1 (f) is a front view of a connection face 42 of a joint with a connection face according to the first embodiment of the present invention.
2 is a cross-sectional view of a piping structure according to a second embodiment of the present invention.
3 is a cross-sectional view of a piping structure according to a third embodiment of the present invention.
4 is a cross-sectional view of a piping structure according to a fourth embodiment of the present invention.
5 is a cross-sectional view of a piping structure according to a fifth embodiment of the present invention.
6 is a cross-sectional view of a piping structure according to a sixth embodiment of the present invention.
7 is a cross-sectional view of a piping structure according to the seventh embodiment of the present invention.
8 is a cross-sectional view of a piping structure according to an eighth embodiment of the present invention.
9 (a) is a sectional view of a piping structure according to the ninth embodiment of the present invention.
9 (b) is a sectional view of an intermediate joint according to a ninth embodiment of the present invention.
10 is a cross-sectional view of a piping structure according to a tenth embodiment of the present invention.
11 is a sectional view of a piping structure according to an eleventh embodiment of the present invention.
12 is a perspective view of a tube structure according to an embodiment of the present invention.
Fig. 13A is a sectional view of a pipe structure according to a twelfth embodiment of the present invention.
Fig. 13 (b) is a sectional view of a piping structure according to the thirteenth embodiment of the present invention.
Fig. 14A is a sectional view of a pipe structure according to a fourteenth embodiment of the present invention.
Fig. 14B is a front view of the connection surface 41r1 of the connection surface joint according to the fourteenth embodiment of the present invention.
Fig. 14C is a sectional view of a fifteenth embodiment of the piping structure.
15 is a sectional view of a piping structure according to a sixteenth embodiment of the present invention;
16 is a partial cross-sectional view of a conventional tubular structure.
17 is a partial cross-sectional view of a conventional tubular structure.
Fig. 18A is a partial sectional view of a conventional pipe structure.
Fig. 18B is a partial sectional view of a conventional pipe structure.
19 is a cross-sectional view of a conventional piping structure.

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described. In addition, the code | symbol used for the drawing of the Example of this invention uses the same number for the same component, and the type is indicated by putting the capital letter of the alphabet before the number. In addition, in each embodiment, parts that need explanation may be indicated by subscripting the alphabet after the number, and other parts that need explanation may be indicated and the description may be omitted.

In addition, in the description of each embodiment of the present invention, a detailed letter may be omitted by adding a letter after the numeral sign. In addition, in each Example, a dimension and a structure are based on JISB2219.

The piping structure 101 which is the 1st Example of the piping structure shown to FIG. 1 (a)-(d) is a pipe joint (one or less) to one end of the pipe 15 which comprises the piping of a hydraulic circuit as shown in FIG. A pipe having a pipe joint configured to fix (A20) (A20) and to secure the pipe joint (hereinafter referred to as a joint structure) (B20) to be joined to the joint structure (A20) at the other end. Hereafter, it describes the tubular structure) 30, and the connection surface 27 and the connection surface 27a of the joint structure A20 or the joint structure B20 of this tube structure 30 are four hexagonal bolts. It consists of the joint (it describes as a joint with a connection surface hereafter) 40 provided with the connection surface which has the connection surfaces 41 and 42 connected by (19).

1D, the piping structure of the right part of the piping structure 101 which consists of the joint surface attachment joint 40 and the piping structure 30a is described as the right piping structure 101a.

The connection surface 41 of the joint with a connection surface 41 is connected to the joint structure A20 arranged concentrically with the opening end 46 of the L-shaped communication passage L43, as shown in Fig. 1 (e). A square 41a (square represented by an imaginary line in Fig. 1 (e)) having a connecting hole 44 composed of four screw holes provided at positions coinciding with the holes A22, with the opening end 46 as the center; It consists of a rectangle 41b which has one side of the length which added the length more than the depth of the connection hole 45 of a screw hole rather than one side of this square 41a.

The connection surface 42 of the joint body with a connection surface 42 is formed in the same plane as the 1st plane formed in the plane containing the connection surface 41, and the 2nd plane which crosses at right angles, and FIG. 1 (f) As shown in the figure, the open end 47 has a centered square 42a, and the open end 47 of the L-shaped communication passage L43 is connected to the through hole of the joint structure A20 concentrically arranged. It has the connection hole 45 which consists of four screw holes provided in the position corresponded to the hole A22. In addition, square 41a and square 42a are the same.

The connecting hole 44 and the connecting hole 45 have the connecting hole 45 as the screw hole, and the connecting hole 44 is provided so as not to interfere with the connecting hole 45 of the screw hole. 44 may be a through hole or a screw hole.

The said connection surface 41 and 42 shall use one as a 1st connection surface, and the other may comprise a 2nd connection surface, and the plane containing this 1st connection surface comprises a 1st plane, and 2nd The plane including the connection surface constitutes the second plane.

Thus, although the 1st connection surface, the 1st plane, and the 2nd connection surface, and the 2nd plane are mutually related, the connection surface 41 and the connection surface 42 are irrelevant, and if the one is made into a 1st connection surface, the other will be It becomes a 2nd connection surface.

The first plane including the connection surface 41 of the joint with attachment surface 40 shown in Fig. 1 (f) and Fig. 1 (e) and the second plane including the connection surface 42 intersect at right angles.

The joint structure A20 provided at one end of the tube structure 30 shown in FIG. 12 is a pipe joint having a connection hole A22 of a through hole formed by the connecting hole, and a joint structure B20 provided at the other end. Is a pipe joint having a connecting hole B22 of a screw hole whose connecting hole is composed of a screw hole.

The tubular structure 30 shown in FIG. 12 is a basic structure for connecting the joint structure A20 and the joint structure B20 of the plurality of tubular structures 30 with the hexagonal hole attachment bolt 19 to form a circuit of a straight pipe. .

The tube structure 30 shown in FIG. 12 includes a connection hole A22 of a through hole constituting a through hole in which a hexagonal socket head bolt 19 is fixed to one end of the tube 15, and a connection surface 27 thereof. A joint structure A20 having a groove 25 for opening the O-ring 39 and a connection hole A22 of the through-hole fixed to the other end of the pipe 15. It consists of a joint structure B20 provided with the connection hole B22 of the screw hole which comprises the screw hole for screwing the said hexagonal hole attachment bolt 19. As shown in FIG.

The joint structure A20 and the joint structure B20 are tightened by screwing the hexagonal socket attaching bolt 19 inserted into the connection hole A22 of the through hole by screwing into the connection hole B22 of the screw hole. At this time, the attachment surface of the connection surface 27 is sealed by the O-ring 39 inserted in the groove 25.

The O-ring 39 is provided on the inside of the connection hole A22 of the through hole and is necessarily provided on the connection surface of the joint structure A20 in accordance with JIS.

That is, the pipe structure 30 connects the joint structure A20 and the joint structure B20 with the hexagonal hole attachment bolt 19 to form a straight pipe. In addition, the structure of the joint structure A20 and the joint structure B20 is based on JISB2219.

The joint structure A20 of the tubular structure 30 extends into the tube end insertion hole 231 into which the end portion 17 of the tube 15 is inserted with a gap, and is inserted into the tube end insertion hole 231. And a connecting hole 24 having a diameter corresponding to the inner diameter 16 of the pipe 15 and a tip 14 of the end portion 17 formed between the connecting hole 24 and the pipe end insertion hole 231. ) Is provided with a step (23) facing each other, and a connecting hole (A22) of a through hole for inserting the hexagonal socket head attachment bolt (19) provided in plural around the connecting hole (24). Configuration.

The joint structure B20 has the same structure as the joint structure A20 except that the groove 25 is omitted instead of the screw hole connecting hole B22 of the through hole of the joint structure A20. Therefore, the joint structure B20 is connected to the joint structure A20 by screwing the hexagonal hole attaching bolt 19 inserted into the connection hole A22 of the through hole of the joint structure A20 into the connection hole B22 of the screw hole. Combined.

The joint structure A20 and the tube 15 are end portions 17 of the tube 15 in the tube end insertion hole 231 of the joint structure A20, as shown in FIGS. 1 (b) and 1 (c). To insert the outer periphery 18 of the tube 15 and the back surface 26 of the joint structure 20 at the welded portion 28, and the inner surface of the front end 14 of the end 17 of the tube 15 and the stairs. It is the structure which has the welding part 29, such as welding or soldering (brass solder, silver solder, etc.) on the inner surface of the part 23. As shown in FIG.

Thus, in order to insert and weld the end 17 of the pipe 15 to the joint structure A20, the diameter of the tube end insertion hole 231 of the joint structure A20 is made larger than the outer periphery 18 of the pipe 15. The gap 13 (corresponding to the gap A described above) is configured because of the slightly larger diameter (about 0.5 mm), but the gap 13 is closed at the welded portion 28 and the welded portion 29. do.

The welded part 29 which closes the said gap 13 is the inward surface 241 of the inner end of the connection hole 24, and the inward surface 161 of the edge part 17 as shown in FIG.1 (c). ), The gap 13 is surely closed. In addition, the welded portion 29 constitutes a smooth flow path free of contaminants because its surface is a smooth surface produced by cooling of the molten metal.

In addition, the welded part of the joint structure A20 and the pipe | tube 15 which are one end of the pipe structure 30 mentioned above, and the welded part of the joint structure B20 and the pipe | tube 15 which are other ends are FIGS. 1 (b)-(c). Since the structure is almost the same as that shown in Fig. 6, detailed description thereof is omitted.

The joint 40 with the connection surface of the piping structure 101 of the 1st Example shown to FIG. 1 (a) is provided with the main body 48, the connection surface 41 and the connection surface which intersect at right angles, and are connected. An elbow-type connection surface-attached joint 40 having a surface 42 and an L-shaped communication passage L43 that is open to the connection surface 41 and the connection surface 42.

The L-shaped communication passage L43 of the elbow type connection surface attached joint 40 is the center of the connection surface 41 of the main body 48 and the connection surface 42 that intersects the connection surface 41 at right angles. The joint structure A20 is provided with the opening end 46 and the opening end 47 opened to the said connection surface 41 and the connection surface 42 on the circumference of the opening end 46. Connection hole 44 provided at a position corresponding to the connection hole A22 of the through hole of the through hole, and a connection hole A22a of the through hole of the joint structure A20a provided on the circumference of the opening end 47. The connection hole 45 provided in the position corresponded to is provided.

The groove 25 provided in the connecting surface 27 of the tubular structure 30 shown in FIG. 1 (a) and the groove 25a provided in the connecting surface 27a of the tubular structure 30a are for inserting O-rings 39 and 39a. Home. The above-described joint 40, pipe 30, and pipe 30a of the pipe structure 101 are manufactured in a factory and are acid-washed to remove all contaminants therein. After that, the connection surface is closed and cured by curing.

Piping structure 101 is connected to the joint surface attachment joint 40 and the pipe structure (30, 30a) stored in the contaminant-free state as described above to the plumbing construction site, the joint surface attachment joint 40, pipe structure ( The curing of 30, 30a) is removed, and it can be assembled as shown in FIG.

That is, in order to assemble the pipe structure 30 and the joint surface attachment joint 40 stored in the factory, first remove the curing, insert the O-ring into the groove 25 of the pipe structure 30, and then into the connection hole (A22) Hexagon socket head cap screw 19 is inserted, and the tip is secured by screwing tightly into the coupling hole 44 of the main body 42 screw hole of the joint with the connection surface 40.

Similarly, in order to assemble the pipe structure 30a to the connection surface 42 of the joint with a connection surface 40, first remove the curing and insert the O-ring into the groove 25a of the pipe structure 30a. Hexagon socket head cap screw 19a is inserted, and the end thereof is tightened and screwed firmly into the coupling hole 45 of the screw hole of the main body 48 of the joint surface mounting joint 40.

The piping structure 101 constructed in this way has no room for infiltration of contaminants in all its operations if care is taken so as not to infiltrate the contaminants when removing the curing during assembly. In addition, since the pollutant does not occur in a situation that is not visible to the naked eye, such as welding, it is possible to check by the naked eye, so it is possible to be careful not to infiltrate the pollutant.

The right piping structure 101a of the piping structure 101 which combined the piping structure 30a and the joint with a connection surface 40 is a basic structure of another embodiment.

The pipe structure 102 of the second embodiment shown in FIG. 2 and the pipe structure 101 of the first embodiment differ in that the joint 40b with the connection surface is formed of a casting.

That is, the joint 40b with a connection surface manufactures the main body 48b and the L-shaped communication path L43b by casting, the connection surface 41b, the connection surface 42b, and the connection hole of the screw hole ( It is the structure which machined 44b, 45b).

As shown in FIG. 2, the L-shaped communication passage L43b of the main body 48b of the connection surface attachment joint 40b is made of a casting, and one end thereof is opened in the connection surface 41b and the other end thereof is connected to the connection surface 42b. Since the L-shaped communication passage L43b to be opened can be configured in a curve, a smooth passage that does not shake the flow of the working oil is obtained.

The pipe structure 30b2 connected to the connection surface 41b of the joint with a connection surface 40b and the pipe structure 30b1 connected to the connection surface 42b have the same configuration as the first embodiment, and the connection surface 41b ) Is the same as in FIG. 1 (e), and the connection surface 42b is the same as in FIG.

The piping structure 102 connects the pipe structure 30b2 and the pipe structure 30b1 to the joint surface attachment joint 40b with the connection surface 41b by the hexagon hole attachment bolt 19b2 and the hexagon hole attachment bolt 19b1. It is connected to the surface 42b, and the elbow piping structure is comprised.

In the piping structure 102 of the second embodiment, the passage is recessed or stepped in the inner surface of the L-shaped communication passage L43b of the pipe structure 30b1, the pipe structure 30b2, and the joint 40b with the connection surface. This is very smooth because no exists.

Since the smoothness of the flow path prevents congestion due to air or contaminants, the flow path can be cleaned only by circulating the working oil at low pressure, and the number of times of flashing by high pressure is reduced.

The right piping structure 102b of the piping structure 102 which combined the pipe structure 30b1 and the joint with a connection surface 40b is used for description of another embodiment.

The piping structure 103 of 3rd Example shown in FIG. 3 is the structure which attached the pipe structure 30c2 to the right piping structure 103c, and is a structure which makes the pipe 15c1 and the pipe 15c2 the elbow pipe.

Although the right piping structure 103c has a structure substantially the same as the right piping structure 101a of the piping structure 101 shown in FIG. 1 (d), the penetration with the connection surface attachment joint 40c is opened in the connection surface 41c. The configuration is different from the configuration of the connection hole 44c of the hole and the configuration of the groove 25c for inserting the O-ring 39c into the connection surface 41c through which the connection hole 44c is opened.

Moreover, the pipe structure 30c2 connected to the said connection surface 41c is a structure which has the joint structure B20c2 provided with the connection hole B22c2 of the screw hole corresponding to the connection hole 44c of the said through hole.

The piping structure 103 is a pipe structure connected to the right piping structure 103c and a hexagonal socket head bolt 49c penetrating the connection hole 44c to the connection surface 41c of the joint surface attachment joint 40c. 30c2).

The piping structure 103 having this configuration is used together with the first embodiment shown in FIG. 1 (d) at the piping site, whereby the joint structure A20c1 of the pipe structure 30c1 and the joint structure B20c2 of the pipe structure 30c2 are used. Can be connected to any scene of the plumbing work.

That is, the first embodiment is a structure in which two joint structures A20 and a joint structure A20a are connected to the joint with a connection surface 40, and in the third embodiment, the joint structure B20c2 and the joint structure A20c1. Because of the configuration to connect the, by using them separately in the piping site there is an effect that can correspond to the difference of the joint structure.

In addition, the right piping structure 103c of the piping structure 103 which combined the pipe structure 30c1 and the joint with a connection surface 40c is a basic structure of another embodiment.

The piping structure 104 of the fourth embodiment shown in FIG. 4 is substantially the same structure as the piping structure 102 of the second embodiment shown in FIG. 2, but the connection surface of the joint 40b with the connection surface of the piping structure 102 ( The groove in which the O-ring 39d is inserted into the connection surface 41d through which the connection hole 44b of the screw hole opened to 41b is made into the connection hole 44d of the through hole is opened. A configuration using the left joint structure B20 in FIG. 12 differs in the configuration in which 25d is provided and the joint structure B20d2 of the tubular structure 30d2 coinciding with the connection surface 41d.

The piping structure 104 is a hexagonal socket head bolt 49Ld in which the tubular structure 30d2 having the joint structure B20d2 on the connection surface 41d is larger than the hexagon socket head bolt 49d and the hexagon bolt head bolt 49d. And a pipe structure 30d1 provided with a joint structure A20 on the connection surface 42d with a hexagon socket head cap screw 19d1.

The right piping structure 104d of the piping structure 104 which combined the piping structure 30d1 and the connection surface attachment joint 40d is a basic structure of another embodiment.

The piping structure 104 which is this structure and the piping structure 102 of 2nd Example shown in FIG. 2 are cooperatively respond | correspond to a piping site. For example, the second embodiment shown in FIG. 2 is a structure in which a joint structure A20b1 and a joint structure A20b2 are connected to a joint with a connection surface 40b. In the fourth embodiment shown in FIG. Since it is the structure which connects B20c2) and joint structure A20c1, there exists an effect which can correspond to the difference of a joint structure by using them separately at a piping site.

In the piping structure 104 of the fourth embodiment, there are no recesses or steps on the inner surface of the passage of the pipe structure 30d1 and the pipe structure 30d2 and the inner surface of the L-shaped communication passage L43d of the joint 40d with the connection surface. Therefore, it becomes extremely smooth flow path. Since the smoothness of this flow passage prevents congestion due to contaminants or air jamming, the flow passage can be cleaned only by circulating the working oil at low pressure, thereby reducing the number of flashes performed by the high pressure.

The piping structure 105 of the 5th Example shown in FIG. 5 is a substantially S-shaped piping used for adjustment of the level | step difference of piping, Comprising from the right piping structure 105e1 and the left piping structure 105e2, as shown in the figure, 15e1 and the pipe 15e2 form a pipe in substantially S shape.

The right piping structure 105e1 has the same configuration as the right piping structure 103c of the third embodiment shown in FIG. 3, and the left piping structure 105e2 has the right piping structure 101a of the first embodiment shown in FIG. Since it is the same as), detailed description is omitted.

In the fifth embodiment shown in Fig. 5, the tubular structure 30e1 is joined to the joint surface attachment joint 40e1 by a hexagonal hole attachment bolt 19e1 to form the right piping structure 105e1, and the joint surface connection joint 40e2 is provided. The pipe structure 30e2 is coupled to the hexagonal socket head attachment bolt 19e2 to form the left pipe structure 105e2.

The piping structure 105 of 5th Example is comprised by combining the connection surface 41e1 and the connection surface 41e2 with the hexagonal hole attachment bolt 49e1 and the right piping structure 105e1 and the left piping structure 105e2.

The piping structure 105 of the fifth embodiment is connected by connecting the joint with the connection surface 40e1 and the joint with the connection surface 40e2 in the direction of the pipe 15e1 and the pipe 15e2, and the interval is 2 The pitches of the two joint structures A20e1 and A20e2 become the minimum dimensions.

Since the space | interval of the pipe 15e1 and the pipe 15e2 piped in parallel in this way becomes the minimum dimension which is the pitch of two joint structure A20e1 and the joint structure A20e2, the connection surface 41e1 and the connection surface 41e2 It is possible to adjust the enlargement by inserting the intermediate joint between the two sides, and when it is necessary to give an angle to the arrangement of the tubes 15e1 and 15e2, it can be adjusted by inserting the angled intermediate joint.

The piping structure 106 of the 6th embodiment shown in FIG. 6 is a substantially S-shaped piping used for adjustment of the level | step difference of piping similarly to the 5th embodiment shown in FIG. 5, and it consists of the right piping structure 106f1 and the left piping structure 106f2. As shown in the figure, the pipe 15f1 and the pipe 15f2 constitute a substantially S-shaped pipe.

The right piping structure 106f1 is substantially the same as the right piping structure 104d of the fourth embodiment shown in FIG. 4, and the left piping structure 106f2 is the same as the right piping structure 102b of the second embodiment shown in FIG. 2. Since the same, detailed description is omitted.

The right piping structure 106f1 is configured by coupling the tubular structure 30f1 to the connection surface attachment joint 40f1 by a hexagonal hole attachment bolt 19f1, and the left piping structure 106f2 is the connection surface attachment joint 40f2. The pipe structure 30f2 is coupled to the hexagonal socket head cap screw 19f2.

The piping structure 106 combines the connection surface 41f1 and the connection surface 41f2 with the right piping structure 106f1 and the left piping structure 106f2 by the hexagonal hole attachment bolt 49f and the hexagonal hole attachment bolt 49Lf. Configure.

In the piping structure 106 of this sixth embodiment, the pipe 15f1 and the pipe 15f2 are connected by attaching a step by the joint with the joint surface 40f1 and the joint with the joint surface 40f2, and the tube 15f1 is connected. ) And pipe 15f2 are piped in parallel, and the space | interval becomes the minimum dimension of the pitch of two joint structure A20f1 and joint structure A20f2.

Since the space | interval of the pipe 15f1 and the pipe 15f2 piped in parallel in this way becomes the minimum dimension which is the pitch of two joint structure A20f1 and the joint structure A20f2, the connection surface 41f1 and the connection surface 41f2 It is possible to adjust by inserting an intermediate joint between the holes, and when it is necessary to give an angle to the arrangement of the tubes 15f1 and 15f2, it can be adjusted by inserting an angled spacer.

The piping structure 106 combines the right piping structure 106f1 and the left piping structure 106f2, and connects the pipe 15f1, the L type communication path L43f1, the L type communication path L43f2, and the tube 15f1, the pipe. The flow path composed of 15f2 becomes a smooth flow path having no uneven portion on its inner surface, and does not store pollutants or air.

The piping structure 107 of 7th Example shown in FIG. 7 is a U-shaped piping used for changing piping direction, and consists of the right piping structure 107g1 and the left piping structure 107g2, and as shown in a figure, 15g1) and the pipe 15g2 form a U-shaped pipe.

The right side piping structure 107g1 has the same configuration as the right side piping structure 105e1 of the fifth embodiment shown in FIG. 5, and the left side piping structure 107g2 is almost the same as the right side piping structure 105e2 of the fifth embodiment shown in FIG. 5. Since the same, detailed description is omitted.

The right piping structure 107g1 of the piping structure 107 is formed by coupling the piping structure 30g1 to the joint surface attachment joint 40g1 with a hexagon socket head cap bolt 19g1, and the left piping structure 107g2 is provided with the connection surface. The pipe structure 30g2 is coupled to the joint 40g2 by a hexagon socket head cap screw 19g2.

The piping structure 107 is comprised by connecting the connection surface 41g1 and the connection surface 41g2 with the hexagonal mounting bolt 49g to the right piping structure 107g1 and the left piping structure 107g2.

The piping structure 107 is configured to make the pipe 15g1 in the same direction as the pipe 15g2 by the coupling of the joint with the connection surface 40g1 and the joint with the connection surface 40g2, and according to the fifth embodiment shown in FIG. The pipe 15e2 of the left piping structure 105e2 is rotated in the direction of the pipe 15g1 of the piping structure 107, and the flow path is U-shaped.

Thus, since the space | interval of the tube 15g1 piped in U shape and the tube 15g2 becomes the minimum dimension which is the pitch of two joint structure A20g1 and joint structure A20g2, the connection surface 41g1 and connection surface Adjustment is possible by inserting an intermediate joint between 41g2, and when it is necessary to angle the arrangement | positioning of pipe 15g1 and 15g2, it can adjust by inserting an angled spacer.

The pipe structure 107 is an example in which the joint 15e1 and the tube 15g2 are rotated 180 degrees in the same direction by rotating the one-joint joint 40e2 of the fifth embodiment in the same direction. It can also be rotated, and the right piping structure 107f1 and the left piping structure 107f2 may be combined, and it may be set as the elbow piping structure with a step | step difference.

The piping structure 108 of the eighth embodiment shown in FIG. 8 is a U-shaped piping used to change the piping direction, and is composed of the right piping structure 108h1 and the left piping structure 108h2, as shown in the drawing. 15h1) and pipe 15h2 form a U-shaped pipe.

The right side piping structure 108h1 has the same structure as the right side piping structure 106f1 of the sixth embodiment shown in FIG. 6, and since the left side piping structure 108h2 is almost the same as the left side piping structure 106f2, its detailed description is omitted. .

The piping structure 108 forms the right piping structure 108h1 by coupling the pipe structure 30h1 to the joint surface attachment joint 40h1 with a hexagonal hole attachment bolt 19h1, and the pipe structure to the connection surface attachment joint 40h2. 30h2 is coupled to the hexagonal socket head bolt 19h2 to form the left piping structure 108h2.

The piping structure 108 combines the connection surface 41h1 and the connection surface 41h2 with the right piping structure 108h1 and the left piping structure 108h2 by the hexagonal hole attachment bolt 49h and the hexagonal hole attachment bolt 49Lh. Configure.

The piping structure 108 is configured to make the pipe 15h1 and the pipe 15h2 in the same direction by the coupling of the joint with the connection surface 40h1 and the joint with the connection surface 40h2, and according to the sixth embodiment shown in FIG. The pipe 15f2 of the left piping structure 106f2 is rotated in the direction of the pipe 15f1, and is equivalent to the structure in which the flow path is U-shaped.

In the piping structure 108, the pipe 15h1 and the pipe 15h2 are piped in the same direction by the joint surface attachment joint 40h1 and the joint surface attachment joint 40h2, and the spacing is two joint structures A20h1, Since it becomes pitch of 40h2), it becomes a minimum dimension.

The distance between the pipe 15h1 and the pipe 15h2 piped in parallel in this way is the minimum dimension, which is the pitch of the two joint structures A20h1 and 40h2, so that it is intermediate between the connection surface 41h1 and the connection surface 41h2. The expansion can be adjusted by inserting the joint, and when it is necessary to give an angle to the arrangement of the tubes 15h1 and 15h2, it can be adjusted by inserting an angled intermediate joint.

The right piping structure 108h1 and the left piping structure 108h2 of the piping structure 108 are combined, and the pipes 15h1 and 15h2 are L-shaped communication passages L43h1, L-type communication passages L43h2 and 15h1. The flow path composed of the pipe 15h2 becomes a smooth flow path having no uneven portion on its inner surface and does not store contaminants or air.

The piping structure 109 which is the 9th Example shown to FIG. 9 (a), (b) has the left piping structure 109j2 through the intermediate joint 34 between the right piping structure 109j1 and the piping structure 30j2. The pipe 15j2 of the pipe structure 30j2 of is changed at a predetermined exit angle.

That is, various piping angles are required in the plumbing construction site, but if they correspond to all of them, the type of joint with a connection surface will increase. Therefore, at the plumbing site, the angle between the joint surface 40j and the pipe 15j2 is measured, and the intermediate joint 34 shown in FIG. It is to reduce the classification.

The intermediate joint 34 includes a passage 35 having openings 35a and 35b that coincide with the L-shaped communication passage L43j of the joint 40j with connection surface and the connection hole 24j2 of the tubular structure 30j2, and Hexagonal socket head bolt 19j2 of the screw hole connecting hole 36 and the tubular structure 30j1, which are disposed around the passage 35, and which the hexagonal socket head bolt 49j of the connection surface attachment joint 40j is screwed together. ) Is provided with a connecting hole 37 constituting a screw hole to be screwed together, and is required between the intermediate connecting surface 32 on which the opening 35a is opened and the intermediate connecting surface 33 on which the opening 35b is opened. It is the structure which installed the angle (theta).

The intermediate joint 34 is manufactured at the factory by accurately measuring the angle θ at a plumbing site, and has a hexagonal socket head cap screw that penetrates the connection hole 36 through the connection hole 44j of the connection surface attachment joint 40j. 19j) are screwed together and the hexagonal socket head bolt 19j2 through which the connection hole 22j2 of the joint structure A20j2 of the tube structure 30j2 passes through the connection hole 37 is screwed together to tighten the tube structure 30j2. The pipe 15j2 and the pipe 15j1 of the pipe structure 30j1 have the effect of piping at an angle coinciding with the site.

The piping structure 110 of 10th Example shown in FIG. 10 is a U-shaped piping used for changing piping direction, and consists of the lower piping structure 110m1 and the lower piping structure 110m2, and as shown in FIG. The 15 m1 and the 15 m2 pipes form a U-shaped pipe.

The lower piping structure 110m1 has the same configuration as the right piping structure 104d of the fourth embodiment shown in FIG. 4, and similarly the upper piping structure 110m2 is the same as the right piping structure 104d of the fourth embodiment shown in FIG. 4. Since the description is almost the same, detailed description is omitted.

The piping structure 110 inserts an intermediate joint 34m between the connection surface 41m1 of the joint with connection surface 40m1 and the connection surface 41m2 with the connection surface attachment joint 40m2, and has a hexagon socket head cap bolt 49m1, 49Lm1) and hexagon socket head cap screws (49m2, 49Lm2).

Since the intermediate joint 34m of the tenth embodiment has a configuration substantially the same as that of the intermediate joint 34 shown in Fig. 9B, its detailed description is omitted.

Both sides of the joints 40m1 and 40m2 with the connection surface of the intermediate joint 34m are provided with the L type communication passage L43m1 and the L type communication passage L43m2.

Further, the end faces 32m and 33m of the intermediate joint 34m have a concentric circular shape with the passage 35m, and the connection hole 36m of the screw hole and the connection hole 37m of the screw hole are provided in the cross section. .

Piping structure 110 is coupled to the connecting holes (36m, 37m) of the screw hole of the intermediate joint (34m) by hexagon socket head cap bolts (49m1, 49m2) and slightly longer hexagon socket head bolts (49Lm1, 49Lm2) It is a structure which fixes the structure 110m1 and the upper piping structure 110m2.

The piping structure 110 can process piping corresponding to the piping site by processing the intermediate joint 34m at the piping site by considering the isolation dimensions of the pipes 15m1 and 15m2. Further, the intermediate joint 34m is better to apply to the dimension where the isolation dimension of the pipe is longer than the total length of the connection hole 36m of the screw hole and the connection hole 37m of the screw hole.

The upper piping structure (110m1) and the lower piping structure (110m2) of the piping structure 110 are combined, and the pipes (15m1 and 15m2), the L-type communication passage (L43m1), the communication passage (35m), the L-type communication passage ( The flow path consisting of L43m2) becomes a smooth flow path with no concave-convex portion on its inner surface and does not store pollutants or air.

The piping structure 111 of 11th Example shown in FIG. 11 is a U-shaped piping used for changing piping direction, and is comprised from the lower piping structure 111n1 and the upper piping structure 111n2, and as shown in a figure, 15n1) and the pipe 15n2 form a U-shaped pipe.

The lower piping structure 111n1 has the same configuration as the right piping structure 102b of the second embodiment shown in FIG. 2, and the upper piping structure 111n2 is substantially the same as the right piping structure 104d of the fourth embodiment shown in FIG. Since the same, detailed description is omitted.

The piping structure 111 inserts the intermediate joint 34n between the connection surface 42n1 of the joint with connection surface 40n1 and the connection surface 42n2 of the joint with connection surface 40n2, and the intermediate joint 34n is inserted into the piping structure 111. Is fixed with a hexagon socket head cap screw (49n) and a hexagon socket head cap bolt (49Ln).

The intermediate joint 34n of the eleventh embodiment is provided with a communication passage 35n for communicating the L type communication passage L43n1 and the L type communication passage L43n2 of the joints 40n1 and 40n2 with the connection surface.

Moreover, the communication path 35n and the communication hole 36n of a through hole are provided in the end surface 32n and 33n of the said intermediate joint 34n in concentric circular shape.

In the piping structure 111 of the eleventh embodiment, the hexagonal socket head bolt 49n and the hexagonal socket head bolt 49Ln are connected to the connection holes 44Ln1 and 44n2 of the through hole of the joint surface attachment joint 40n2 and the intermediate joint 34n. Penetrates through the connecting hole 36n of the through hole of the through hole and engages the tip thereof with the connecting hole 44n1 of the screw hole of the joint 40n1 with the connection surface, thereby interposing the lower piping structure 111n1 and the upper piping structure 111n2 as an intermediate. It is a structure fixed to the joint 34n.

The piping structure 111 can process piping corresponding to the piping site by processing the intermediate joint 34n at the piping site by considering the isolation dimensions of the pipe 15n1 and the pipe 15n2. In addition, the intermediate joint 34n is preferably applied to a dimension whose isolation dimension of the pipe is shorter than twice the length of the connection hole 44n1 of the screw hole.

The lower piping structure 111n1 and the upper piping structure 111n2 of the piping structure 111 are coupled to each other, and are composed of a pipe 15n1, an L-type communication passage L43n1, an L-type communication passage L43n2, and a pipe 15n2. The flow path is a smooth flow path with no concave-convex portion on its inner surface and does not store pollutants or air.

The piping structure 112 of the twelfth embodiment shown in Fig. 13A is a T-shaped pipe used for branching the pipe direction, and the T-shaped pipe structure 112p constituting the pipe structure 112 has a T-type connection surface. The pipe structure 30p1 is fixed to the joint 40p1 with the hexagonal socket head bolt 19p1, and the pipe structure 30p2 is fixed with the hexagonal socket head bolt 19p2.

The T-type connection surface-attached joint 40p includes a tube structure 30p1, a tube structure 30p2, and a T-type communication passage T43p connected to the tube structure 30p.

The T-type communication passage T43p is connected to a pipe 15p1 of the pipe structure 30p1, a pipe 15p2 of the pipe structure 30p2, and a pipe 15p of the pipe structure 30p to connect the pipe structure 30p. Branch to the pipe 15p1 of the pipe structure 30p1 and the pipe 15p2 of the pipe structure 30p2 in two directions.

The shape of the connection surface 42p to which the pipe structure 30p of the joint with a connection surface 40p is connected is the same structure as the connection surface 41 shown in FIG. 1 (f), and the pipe structures 30p1 and 30p2 are connected. Since the connecting surfaces 41p1 and 41p2 have the same structure as the connecting surface 42 shown in Fig. 1E, detailed description thereof will be omitted.

The piping structure 112 fixes the piping structure 30p1 to the connection surface 41p1 of the T-type connection surface attachment joint 40p of the piping structure 112p with a hexagon socket head cap bolt 19p1, and at the same time, the T-type connection The pipe structure 30p2 is fixed to the connection surface 41p2 of the surface attachment joint 40p with a hexagon socket head cap screw 19p2, and the fluid flowing from the pipe 15p of the pipe structure 30p is piped 15p1. Branches to the tube 15p2.

The T-type connection surface joint 40p of the piping structure 112 of the twelfth embodiment having the above-described configuration, the pipe structure 30p1, the pipe structure 30p2, and the pipe structure (connected to the connection surface joint 40p) ( The branch passage consisting of 30p) becomes a smooth flow path having no uneven portion on its inner surface and does not store contaminants.

The piping structure 113 of 13th Example shown in FIG. 13 (b) is a multidirectional branched pipe used for connecting the lower piping structure 113u1 and the upper piping structure 113u2 to branch in multiple directions. The lower piping structure 113u1 and the upper piping structure 113u2 branching in the directions have almost the same configuration as the piping structure 112p described by the twelfth embodiment.

The piping structure 113 of the thirteenth embodiment polymerizes the joint with the joint surface 40u1 and the joint with the connection surface 40u2 constituting the lower piping structure 113u1 and the upper piping structure 113u2, and the connection surface. The pipe structure 30u3 is arrange | positioned at the lower connection surface 41u1 of the attachment joint 40u1, and the pipe structure 30u4 is arrange | positioned at the upper connection surface 41u2 of the connection surface attachment joint 40u2.

The tubular structure 30u3 disposed below the piping structure 113u1 of the piping structure 113 of the thirteenth embodiment, and the tubular structure 30u4 disposed above the piping structure 113u2 are provided with a hexagonal socket head bolt 49u. It is a structure which penetrates through the structure 30u3, the connection surface attachment joint 40u1, and the connection surface attachment joint 40u2, and couples the front-end | tip to the connection hole B22u3 of the screw hole of the pipe structure 30u3.

The piping structure 113 of 13th Example which is the said structure branches the fluid which flows in from the pipe 15u1 of the pipe structure 30u1 connected to the piping structure 113u1 in three directions of the pipe 15u2-the pipe 15u4. do.

The flow passage consisting of the pipe structures 30u1 to 30u4, the T-type communication passage T43u1, and the T-type communication passage T43u2 of the pipe structure 113 of the thirteenth embodiment having the above-described configuration is a smooth passage having no uneven parts on its inner surface. Do not store contaminants.

The piping structure 114 of the fourteenth embodiment shown in Fig. 14A is a branched pipe used for branching in multiple directions, and the pipe structure 114r for branching the passages in multiple directions is a joint with a cross connection face 40r. ), The tubular structure 30r1 and the tubular structure 30r2 are fixed to the hexagonal socket head cap screw 19r1 and the hexagonal socket head cap bolt 19r2.

The joint 40r with a cross connection surface is composed of a pipe 15r1 of a pipe structure 30r1, a pipe 15r2 of a pipe structure 30r2, a pipe 15r3 of a pipe structure 30r3 and a pipe of a pipe structure 30r4. There is a cross communication passage C43r connected to 15r4.

The cross-type communication passage C43r has a pipe structure 30r1 and a pipe structure 30r2 connected to both ends of the cross-type communication passage C43r, and a pipe structure at both ends of the cross-type communication passage C43r. 30r3 and the tube structure 30r4 are connected, and branch the tube 15r1 in three directions of the tube 15r2, the tube 15r3, and the tube 15r4.

The connection surface 42r1 to which the pipe structure 30r1 of the joint with a connection surface 40r is connected is a square structure similar to the connection surface 42 of FIG. 1 (f), and the pipe structure 30r2 of the joint with a connection surface 40r is connected. The connection surface 42r2 to which () is connected also has a square structure similar to the connection surface 42 of FIG. 1 (f).

In addition, the connection surface 41r1 to which the pipe structure 30r3 is connected is attached with the hexagonal hole of the cross-shaped communication path C43r and the pipe structure 30r3 arrange | positioned in concentric circular shape as shown in FIG.14 (b). It is a rectangular structure provided with the connection hole 44r1 of the screw hole to which the bolt 19r3 engages, and long as the depth of the connection hole 45r formed in the connection surface 42r1, 42r2.

As shown in Fig. 14 (b), the connection surface 41r2 is formed of a screw hole to which the hexagonal hole attachment bolt 19r4 of the tubular structure 30r3, which is arranged in a concentric circular shape, is connected to the cross-shaped communication passage C43r. It is a rectangular structure provided with the connection hole 44r2 and long as the depth of the connection hole 45r1 formed in the connection surface 42r1 and 42r2.

In the piping structure 114 of the fourteenth embodiment, the tubular structure 30r1 is fixed to the connecting surface 42r1 with the hexagonal hole mounting bolt 19r1, and the tubular structure 30r2 is fixed to the connecting surface 42r2 with the hexagonal hole mounting bolt ( 19r2), and the pipe structure 30r3 is fixed to the connection surface 41r by the hexagon socket head cap bolt 19r3. The fluid flowing from the pipe 15r1 of the pipe structure 30r1 is connected to the pipe 15r2-. Branching in three directions of the pipe (15r4).

The branch passage consisting of the joint surface attachment joint 40r of the piping structure 114 of 14th Example which is the above structure, and the pipe structure 30r1-the pipe structure 30ar4 connected to this joint surface attachment joint 40r is the same. It has a smooth flow path with no irregularities on the inside, and does not store pollutants.

The piping structure 115 of the fifteenth embodiment shown in FIG. 14 (c) is a multidirectional branched pipe used to connect the lower piping structure 115s1 and the upper piping structure 115s2 to branch in multiple directions. The piping structures 115s1 and 115s2 branching in the direction have substantially the same configuration as the cross-branching piping structure 114r described in the fourteenth embodiment.

In the piping structure 115 of the fifteenth embodiment shown in Fig. 14 (c), the joint with joint surface 40s1 and the joint with joint surface 40s2 constituting the piping structures 115s1 and 115s2 are polymerized to form a joint with the joint surface. The pipe structure 30s5 is arrange | positioned at the connection surface 41s1 of the lower surface of 40s1, and the pipe structure 30s6 is arrange | positioned at the connection surface 41s2 of the upper surface of the joint 40s2 with a connection surface.

The pipe structure 30s5 disposed below the pipe structure 115s1 arranged as described above, and the pipe structure 30s6 disposed above the pipe structure 115s2 have a hexagonal socket head bolt 49s having a pipe structure 30s6. And the connection surface attachment joint 40s2 and the connection surface attachment joint 40s1, and the tip is coupled to the connection hole B22s5 of the screw hole of the pipe structure 30s5.

The piping structure 115 having the above configuration branches the fluid flowing from the pipe 15s1 of the pipe structure 30s1 connected to the pipe structure 115s1 in five directions of the pipes 15s2 to 15s6.

The branch passage consisting of the pipe structure (30s1 to 30s6), the cross-type communication passage (C43s1), and the cross-type communication passage (C43s2) of the pipe structure 115, which is the above-described structure, becomes a smooth passage having no uneven parts on its inner surface, and thus contaminants. Do not store it.

The piping structure 116 of the 16th embodiment shown in FIG. 15 is a multidirectional branched pipe used to connect the lower piping structure 116t1 and the upper piping structure 116t2 to branch in multiple directions, and branch the passage in multiple directions. do.

The piping structure 116 of the sixteenth embodiment shown in FIG. 15 has a structure similar to that of the piping structure 112p of the thirteenth embodiment shown in FIG. 13A having the piping structure 116t1 constituting the piping structure 116, The piping structure 116t2 is substantially the same structure as the piping structure 114r of 12th Example shown to FIG. 14 (a).

The piping structure 116 of the sixteenth embodiment polymerizes the joints 40t1 and 40t2 with the connection surface constituting the piping structure 116t1 and the piping structure 116t2, and connects the connection surfaces of the lower surfaces of the joints with connection surface 40t1 ( The pipe structure 30t3 is disposed on 41t1, the pipe structure 30t4 is disposed on the upper surface of the joint 40t2 with a connection surface, and the pipe structure 30t5 is connected to the connection surface 42t2 of the joint 40t2 with a connection surface. ) Is fixed structure.

In the piping structure 116 of the sixteenth embodiment, the hexagon socket head cap bolts 49t penetrate through the joint surface attachment joint 40t1 of the piping structure 116t1 and the joint surface attachment joint 40t2 of the piping structure 116t2. The tip is coupled to the connection hole B22t3 of the screw hole of the pipe structure 30t3.

The piping structure 116 which is the said structure branches the fluid which flows in from the pipe 15t1 of the pipe structure 30t1 connected to the piping structure 116t1 to four directions of the pipe 15t2-the pipe 15t5.

The branch passage consisting of the pipe structure (30t1 to 30s5), the cross communication passage (C43t1), and the T-type communication passage (T43t2) of the pipe structure 116, which is the above configuration, becomes a smooth flow path having no uneven parts on its inner surface to contaminate the contaminants. Do not store it.

Since the main body 48b of the joint 40b of the second embodiment shown in FIG. 2 is formed by casting, the connection surface 41 and the connection surface 42 of the L-shaped communication passage L43b are opened. The ends 43b1 and 43b2 are cut so that the casting surface is smooth and the center can be precisely specified.

Cutting of the connection surface 41b of the L-shaped communication passage L43b and the opening ends 43b1 and 43b2 of the connection surface 42b is extremely small to the extent that the casting surface disappears, and the taper of small diameter is moved inward from the opening end. It is a (taper) shape.

The four connection holes 44b and 45b provided in the connection surfaces 41b and 42b of the joint with attachment surface 40b of the second embodiment shown in FIG. 2 are formed of the opening ends 43b1 and 43b2 having the above-described casting surfaces. It is processed with the center as the center.

The connection surface to be connected has one connection hole formed of a screw hole, the other being a through hole, and the through hole has a slightly larger diameter (11 mm through hole in the case of a 10 mm screw) than the screw hole.

The matching of the opening end in the connecting surface to connect connects the guide screw which has the head of the diameter slightly smaller than the connection hole of a through hole, to the connection hole of the diagonal screw hole of four connection holes, The connecting holes of the through holes are inserted into the screws to coincide the opening ends of the two connection surfaces.

Next, after fixing the hexagon socket head cap screws through the connection holes of the remaining two screw holes, the guide screws of the through holes are removed and the hexagon socket head cap screws are inserted to fix the opening ends on the connection surface.

The above processing is applied to all of the joints with a connection surface having the main body of the casting. For this reason, it has a smooth casting surface peculiar to the casting and precisely matches the communication passages at the connection surface, so that the passage is smoothed and no contaminants are stored.

Although the above-described embodiment has described a piping structure in which a joint with a connection surface and a pipe structure are combined, the use of the joint with a connection surface is applied to an input / output port of a hydraulic device (hydraulic cylinder, hydraulic pump, hydraulic motor, directional valve) as a use of the connection surface joint. There is also a direct connection.

As described above, when directly connecting to the input / output port of the hydraulic device, the radius of curvature can be minimized to half of the connection surface.

10 Piping Structure
13 interstitial
14 fleet
15 tubes
16 bore
17 ends
18 Outsourcing
19 Hexagon socket head cap screw (bolt)
A20 Pipe Joint (Joint Structure)
B20 Pipe Joint (Joint Structure)
A22 connecting hole (consists of through hole or screw hole)
B22 Connection hole (composed of screw hole)
23 stairs
231 tube insertion hole
24 connection hole
27 connection surface
28 Welding part (welding part)
29 weld
30 pipe structure
32 intermediate interface
33 intermediate interface
34 middle solid joint
35 passage 35
36 connecting hole (constituting a screw hole)
37 Connection hole (constituting screw hole)
39 O-Ring
40 solid joint
41 connection surface (first connection surface)
42 connection surface (second connection surface)
43 Communication Paths
44 Connection hole (first connection hole)
45 Connection hole (second connection hole)
46 Opening End (First Opening End)
47 Opening End (2nd Opening End)
48 main unit
A gap
Length of L30 pipe structure

Claims

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A first connection surface and a second connection surface connected to a connection body such as a port of a hydraulic device having a passage through which hydraulic oil flows or a joint of a pipe;
A first opening end opened in the first connection surface and connected to the passage;
A first connection hole which is opened in the first connection surface and is composed of a screw hole arranged concentrically with the first opening end;
A second opening end opened in the second connection surface and connected to the passage;
A second connecting hole which is formed in the second connecting surface and is formed of a through hole or a screw hole arranged concentrically with the second opening end;
The main body provided with the communication path which communicates the said 1st opening end and the said 2nd opening end,
While making the arrangement of the said 1st connection hole and the said 2nd connection hole the same,
A first plane including the first connection surface and a second plane including the second connection surface intersect, and at the same time, the first connection surface is a square centered around the first opening end, and the second The connecting surface includes a square equal to the square centered around the second opening end, and one side of the second connecting surface has a rectangular shape having a length equal to or greater than the depth of the first connecting hole on one side of the square. The joint provided with the connection surface characterized by the above-mentioned.

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A first connection surface and a second connection surface connected to a port of a hydraulic device having a passage for circulating hydraulic oil or a joint of a pipe, and a first opening end opened to the first connection surface and connected to the passage; A first connection hole comprising a screw hole opened in the first connection surface and arranged concentrically with the first opening end, and a second opening end opened in the second connection surface and connected to the passage; A second connection hole formed in the second connecting surface and formed of a through hole or a screw hole arranged concentrically with the second opening end, and a communication passage communicating the first opening end with the second opening end. A first body having a main body, the same arrangement of the first connection hole and the second connection hole of the main body, and a first plane including the first connection surface and the second connection surface; 2 planes intersect, at the same time The first connection surface is a square with the first opening end as the center, and the second connection surface includes the same square as the square with the second opening end as the center, and one side of the second connection surface is A joint having a rectangular connection surface having a length of adding a length equal to or greater than the depth of the first connection hole to a square side;
The pipe constituting the pipe, and one end of the pipe is inserted into the pipe end insertion hole on one side into which the end of one side of the pipe is inserted with a gap, and the pipe end insertion hole is extended to correspond to the inner diameter of the pipe. A connection hole on one side having a diameter, a connection surface on one side where the connection hole is opened, and a surface on which the one end pipe insertion hole is opened, and the connection hole on the one side is formed on the connection surface on the one side. It consists of a sealing seal | sticker which surrounds and the connection hole of the through-hole arrange | positioned concentrically with the said connection hole in the outer periphery of this seal groove, and simultaneously welding the inner surface of the said one end and the inner surface of the said one connection hole, On one end of the pipe joint, which is welded and fixed to the outer circumference of the pipe and the surface on which one end of the pipe end insertion hole is opened, and the end of the other side of the pipe, the other end of the pipe has a gap. The other end of the tube end insertion hole to be inserted and the other end of the connection hole which has a diameter corresponding to the inner diameter of the tube, the other end of the connection surface to which the opening is opened, and the other end of the tube end insertion hole. A screw hole connecting hole provided with a surface through which a hole is opened, and having a connection hole of the through hole arranged on the other connection surface concentrically with the other connection hole on the other side; A pipe joint is formed by welding the inner surface of the other end and the inner surface of the connection hole on the other side, and welding and fixing the outer circumference of the tube and the surface on which the other end opening is opened. Consisting of one tube,
A pipe structure in which a connection surface of a joint provided with the connection surface and a pipe joint of a pipe provided with the pipe joint are fixed by screwing.